1998 JAGUAR X308 valve

Pinpoint test A: P0740
DTC P0730 Incorrect gear ratioEngaged gear implausible / transmission
slipping Oil level low
Valve body assembly faulty
Transmission faulty
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*
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*GO to Pinpoint Test H *
DTC P0780 Shift malfunctionValve body assembly faulty
Transmission faulty
*
*GO to Pinpoint Test H *
PINPOINT TEST A : P0740
TEST CONDITIONSDETAILS/RESULTS/ACTIONS
A1: RETRIEVE DTCS
• NOTE: Battery and or ECM disconnection prior to scanning wi
ll erase all data, ensure that the correct DTC is present.
Connect the scan tool 1
Have the DTC(s) and freeze frame data been recorded?
Yes GO to A2
A2: CHECK TORQUE CONVERTER CLUTCH SOLENOID RESISTANCE
With, EM062 disconnected, measure the resistance between 1

With EM062 disconnected, measure the resistance
between the following, noting the relevant DTC 1
For P0702 or P0753 EM062/38 and EM062/014 2
For P0702 or P0758 EM062/38 and EM062/016 3
For P0702 or P0763 EM062/38 and EM062/015 4
Is the resistance 105 to 110 kOHM?
Yes Reconnect EM062
GO to C10
No Disconnect GB001 and reconnect EM062
GO to C9
C9: RENEW VALVE BODY ASSEMBLY
Renew the Valve Body Assembly; refer to 44.40.01. 1
Drive the vehicle for a period from cold to include idle,
brisk acceleration and steady state cruising up to and
including normal engine temperature. Check for the
presence of DTC 2
Has the fault code cleared?
Yes STOP
No GO to C10
C10: END
Cycle the ignition ON - (OFF for 2 minutes) - ON, start
the engine and run >1600 rpm 1
Has the fault code cleared?
Yes STOP
No P0702 present?
Yes GO to D1
No

Pinpoint test E: P0702
With EM062 disconnected, measure the resistance
between the following, noting the relevant DTC 1
For P0702 or P0748 EM062/38 and EM062/036 2
For P0702 or P1748 EM062/38 and EM062/037 3
Is the resistance 16 to 18 kOHM?
Yes Reconnect EM062
GO to D9
No Renew the Valve Body Assembly; refer to 44.40.01.
Drive the vehicle for a period from cold to include idle,
brisk acceleration and steady state cruising up to and
including normal engine temperature.
GO to D9
D9: END
Cycle the ignition ON - (OFF for 2 minutes) - ON, start
the engine and run >1600 rpm 1
Has the fault code cleared?
Yes STOP
No Contact Jaguar Service
PINPOINT TEST E : P0702
TEST CONDITIONSDETAILS/RESULTS/ACTIONS
E1: RETRIEVE DTCS
• NOTE: Battery and or ECM disconnection prior to scanning wi ll erase all data, ensure that the correct DTC is present.

Pinpoint test H: P0730, P0780
Connect the scan tool 1
Have the DTC(s) and freeze frame data been recorded?
Yes GO to G2
G2: RENEW TCM
Renew the TCM 1
Has the TCM been renewed?
Yes GO to G3
G3: END
• NOTE: The following step must be carried out in order that sy stem adaptions can take place.
Drive the vehicle for a period from cold to include idle, brisk
acceleration and steady state cruising up to and including
normal engine temperature. Check for the presence of DTC 1
Has the fault code cleared?
Yes STOP
No Contact Jaguar Service
PINPOINT TEST H : P0730, P0780
TEST CONDITIONSDETAILS/RESULTS/ACTIONS
H1: RETRIEVE DTCS
• NOTE: Battery and or ECM disconnection prior to scanning wi ll erase all data, ensure that the correct DTC is present.
Connect the scan tool 1
Have the DTC(s) and freeze frame data been recorded?
Yes GO to H2
H2: RENEW VALVE BODY ASSEMBLY
Renew the valve body assembly 1
Drive the vehicle for a period from cold to include idle, brisk
acceleration and steady state cruising up to and including
normal engine temperature. Check for the presence of DTC 2
Has the fault code cleared?

Automatic Transmission/Transaxle - 4.0L SC V8 - AJ26 - Main Control
Valve Body
In-vehicle Repair
Removal
• NOTE: This procedure will not remove re sidual fluid from the torque converter.
1. Disconnect the battery ground lead.
2. Raise the vehicle for access.
3. Remove the RH catalytic converter; refer to Operation
17.50.10.

4. Remove the harness heatshield lower fixing.
Remove the screw heatshield / fluid pan clamp.

5. Remove the harness heatshield.
Pull the heatshield from under the clip.

6. Disconnect the transmission link harness connector.
1. Release the locking lever.
7. Release the (transmission case mounted) female connector.
Remove the (center) retaining bolt.

8. Drain the transmission fluid.
8. WARNING: TRANSMISSION FLUID MAY CAUSE
SEVERE BURNS, ENSURE THAT ALL SAFETY PROCEDURES
ARE OBSERVED AND THAT THE RECEPTACLE FOR WASTE
HAS SUFFICIENT CAPACITY.
Carefully remove the drain pl ug and discard the sealing
washer.
9. Remove the fluid pan; refer to Operation 44.24.05,

10. Remove the fluid filter.
Pull the filter squarely to disengage the pick-up 'O' ring
and location tang - there is NO mechanical retention.

11. Remove the selector detent leaf spring.
Remove the screw.
12. Remove the dowel - leaf spring to valve body.

Installation


13. Remove the valve body assembly.
Remove the nine bolts which re tain the valve body to the
transmission case.
1. Installation is the re verse of the removal procedure, noting the
following:
2. Clean all mating faces and relevant parts.

3. Tighten the nine bolts securing the valve body, to the specified
torque figure.

4. Refit the dowel (leaf spring to valve body) and the leaf spring.
Fit and tighten the securing bolt to the specified torque figure.
5. Tighten the centre retaining bolt of the electrical connector to
the specified torque figure.

Is hard-wired to the transmission control module.
Kickdown Switch (where fitted)

The kickdown switch:
Is floor mounted under the accelerator pedal. Is operated by pressing the pedal to the full throttle position. Provides maximum acceleration on driver demand, by signal ling the transmission control module to select the lowest gear to give maximum wheel torque.
Transmission Unit Gear Selector

The gear selector at the transmission unit:
Is connected to the driver's selector module by a Bowden cable. Operates the manual selector valve, which is part of the electro-hydraulic control unit. Operates the rotary switch, which is connected to the transmission control module.
Transmission Switches
Location, Rotary Switch